Heat medium relay unit



FIG. 1 is a front, top and right side perspective view of a heat medium relay unit, showing a first embodiment of our new design;

FIG. 2 is a rear, top and left side perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof;

FIG. 9 is a front, top and right side perspective view of a heat medium relay unit, showing a second embodiment of our design;

FIG. 10 is a rear, top and left side perspective view thereof;

FIG. 11 is a front elevational view thereof;

FIG. 12 is a rear elevational view thereof;

FIG. 13 is a left side elevational view thereof;

FIG. 14 is a right side elevational view thereof;

FIG. 15 is a top plan view thereof; and,

FIG. 16 is a bottom plan view thereof.

The broken lines in all views show unclaimed subject matter only and form no part of the claimed design. 

CLAIM The ornamental design for a heat medium relay unit, as shown and described. 